[gmx-users] bad bond in polymer

nicegromacs nicegromacs at live.cl
Fri Aug 14 20:31:59 CEST 2009


Hi Justin,

ups!! I am sorry this is the exact .pdb file.

HETATM    1  CAA DR0     1      83.043  46.127  36.820  1.00  0.00
HETATM    2  CAB DR0     1      82.411  45.765  35.421  1.00  0.00
HETATM    3  CAC DR0     1      81.495  46.822  34.598  1.00  0.00
HETATM    4  CAD DR0     1      80.621  46.369  33.071  1.00  0.00
HETATM    5  CAE DR0     1      79.305  47.302  32.172  1.00  0.00
HETATM    6  CAF DR0     1      77.939  46.749  31.124  1.00  0.00
HETATM    7  CAG DR0     1      76.264  47.439  30.612  1.00  0.00
HETATM    8  CAH DR0     1      74.636  46.805  29.962  1.00  0.00
HETATM    9  CAI DR0     1      72.805  47.674  30.179  1.00  0.00
HETATM   10  CAJ DR0     1      73.794  48.838  31.123  1.00  0.00
HETATM   11  OAK DR0     1      74.815  49.342  30.292  1.00  0.00
HETATM   12  OAL DR0     1      74.592  48.143  32.194  1.00  0.00
HETATM   13  CAM DR0     1      71.093  47.685  29.486  1.00  0.00
HETATM   14  CAN DR0     1      71.598  47.212  28.208  1.00  0.00
HETATM   15  OAO DR0     1      72.440  48.255  27.735  1.00  0.00
HETATM   16  OAP DR0     1      72.374  46.050  28.399  1.00  0.00
HETATM   17  CAA DRG     2      72.093  46.197  36.714  1.00  0.00
HETATM   18  CAB DRG     2      71.418  45.759  35.400  1.00  0.00
HETATM   19  CAC DRG     2      71.084  46.901  34.417  1.00  0.00
HETATM   20  CAD DRG     2      70.620  46.251  33.139  1.00  0.00
HETATM   21  CAE DRG     2      70.650  47.255  32.000  1.00  0.00
HETATM   22  CAF DRG     2      69.655  46.512  30.955  1.00  0.00
HETATM   23  CAG DRG     2      69.081  47.504  29.843  1.00  0.00
HETATM   24  CAH DRG     2      67.208  47.518  29.256  1.00  0.00
HETATM   25  CAI DRG     2      65.298  47.601  29.691  1.00  0.00
HETATM   26  CAJ DRG     2      65.629  48.362  30.827  1.00  0.00
HETATM   27  OAK DRG     2      65.140  49.590  30.429  1.00  0.00
HETATM   28  OAL DRG     2      64.837  47.815  31.709  1.00  0.00
HETATM   29  CAM DRG     2      63.041  47.557  29.333  1.00  0.00
HETATM   30  CAN DRG     2      62.808  47.023  27.931  1.00  0.00
HETATM   31  OAO DRG     2      63.130  48.142  27.185  1.00  0.00
HETATM   32  OAP DRG     2      63.560  45.894  27.706  1.00  0.00
HETATM   33  CAA DRG     3      61.174  46.188  36.668  1.00  0.00
HETATM   34  CAB DRG     3      60.510  45.777  35.344  1.00  0.00
HETATM   35  CAC DRG     3      60.221  46.928  34.352  1.00  0.00
HETATM   36  CAD DRG     3      59.724  46.337  32.998  1.00  0.00
HETATM   37  CAE DRG     3      60.252  47.307  31.985  1.00  0.00
HETATM   38  CAF DRG     3      61.089  46.606  30.881  1.00  0.00
HETATM   39  CAG DRG     3      60.868  47.564  29.740  1.00  0.00
HETATM   40  CAH DRG     3      58.621  47.652  29.253  1.00  0.00
HETATM   41  CAI DRG     3      56.328  47.703  29.755  1.00  0.00
HETATM   42  CAJ DRG     3      55.914  48.516  30.963  1.00  0.00
HETATM   43  OAK DRG     3      55.050  49.545  30.403  1.00  0.00
HETATM   44  OAL DRG     3      54.945  47.724  31.565  1.00  0.00
HETATM   45  CAM DRG     3      54.420  47.478  29.367  1.00  0.00
HETATM   46  CAN DRG     3      53.587  47.142  27.983  1.00  0.00
HETATM   47  OAO DRG     3      52.713  48.009  27.325  1.00  0.00
HETATM   48  OAP DRG     3      53.396  45.805  27.517  1.00  0.00
HETATM   49  CAA DR1     4      50.257  46.173  36.646  1.00  0.00
HETATM   50  CAB DR1     4      49.673  45.778  35.270  1.00  0.00
HETATM   51  CAC DR1     4      49.360  46.939  34.273  1.00  0.00
HETATM   52  CAD DR1     4      49.270  46.480  32.735  1.00  0.00
HETATM   53  CAE DR1     4      50.289  47.086  31.602  1.00  0.00
HETATM   54  CAF DR1     4      51.813  46.713  31.234  1.00  0.00
HETATM   55  CAG DR1     4      52.487  47.720  29.966  1.00  0.00
HETATM   56  CAH DR1     4      50.870  47.989  29.178  1.00  0.00
HETATM   57  CAI DR1     4      48.982  47.816  29.191  1.00  0.00
HETATM   58  CAJ DR1     4      47.901  48.319  30.192  1.00  0.00
HETATM   59  OAK DR1     4      47.004  49.132  29.503  1.00  0.00
HETATM   60  OAL DR1     4      46.963  47.171  30.588  1.00  0.00
HETATM   61  CAM DR1     4      47.752  46.922  28.157  1.00  0.00
HETATM   62  CAN DR1     4      46.372  47.149  27.020  1.00  0.00
HETATM   63  OAO DR1     4      45.018  47.950  26.877  1.00  0.00
HETATM   64  OAP DR1     4      46.019  46.082  26.137  1.00  0.00
TER
ENDMDL


--------------------------------------------------
From: "Justin A. Lemkul" <jalemkul at vt.edu>
Sent: Friday, August 14, 2009 12:14 PM
To: "Gromacs Users' List" <gmx-users at gromacs.org>
Subject: Re: [gmx-users] bad bond in polymer

>
>
> nicegromacs wrote:
>> I follow some of the step of 
>> http://oldwww.gromacs.org/pipermail/gmx-users/2009-March/040125.html (I 
>> omitted the change in the .hdb file because I don't have explicit 
>> hydrogens). Well, I build a polymer with 3 units. The head (H), one 
>> repeat unit (R)and tail (T) for the polymer (H-R-T) and this gives ok, 
>> but when I add one more repetitive unit (H-R-R-T) I get the following 
>> error:
>> Program pdb2gmx, VERSION 3.3.3
>> Source code file: ../../../../src/kernel/pgutil.c, line: 87
>> Fatal error:
>> Atom CAM not found in residue 1083339441 while adding improper
>>
>> -------------------------------------------------------
>>
>
> It looks like pdb2gmx is finding some kind of undefined residue.  Can you 
> post the .pdb file?
>
> -Justin
>
>> "Stop Drinking My Beer !" (The Amps)
>>
>>
>>>
>>>
>>> nicegromacs wrote:
>>>
>>>>   CAG -CAM
>>>
>>> Defining a bond to a previous residue will certainly fail for at least 
>>> one terminus of your polymer chain.  You may find this post useful:
>>>
>>> http://oldwww.gromacs.org/pipermail/gmx-users/2009-March/040125.html
>>>
>>> If things still aren't working, please post the structure file, as well, 
>>> and identify the bond that is being formed that shouldn't.
>>>
>>> -Justin
>>>
>>> -- 
>>> ========================================
>>>
>>> Justin A. Lemkul
>>> Ph.D. Candidate
>>> ICTAS Doctoral Scholar
>>> Department of Biochemistry
>>> Virginia Tech
>>> Blacksburg, VA
>>> jalemkul[at]vt.edu | (540) 231-9080
>>> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>>
>>> ========================================
>>> _______________________________________________
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>>
>
> -- 
> ========================================
>
> Justin A. Lemkul
> Ph.D. Candidate
> ICTAS Doctoral Scholar
> Department of Biochemistry
> Virginia Tech
> Blacksburg, VA
> jalemkul[at]vt.edu | (540) 231-9080
> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>
> ========================================
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